Megashake is a ****

I'm bitterly disappointed in this Megashake campaign. It is used to mislead customers. I have won three vouchers at different places they all don't work! I won two for OneDayOnly one Netflorist none of them work. When they must resolve it takes forever and they want ridiculous documents and stupid reasons like "please reset your phone" how is that supposed to help with giving me an invalid voucher. I have cart loaded when I must check out the vouchers don't work everyday time! Don't lie and mislead customers. I'm sick and tired of all these campaigns which is false advertising.